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itnitrd entre @tutti @twine JOSEPH XVQV. RAWLINS AND SAMUEL STEPHENS, OF HOEUGHTON,

v MlCHIGAN.

Letters Patent No.'9l,966, lated June 29, 1869.

LMPROVED ORE-CONCNTRATOR.

The Schedule referred to :in these Letters Patent and making part of the same.

To all whom 'it may concern:

Be it known that we, JOSEPH W. V. RAWLINs and SAMUEL STEPHENS, ot' Houghton, inthe county of Houghton, and State of Michigan, have invented a new and improved Slime Ore-Ooncentrator; and We do hereby declare that the following is afull, clear, and exact description thereof, which will enable others skilled in the 'art to make and use the same, reference being had to the accompanying drawings, forming part of this specification.

The object oi this invention is to provide an Vimproved machine for cleaning ores of copper, goldbearing sulphurets, silver-ores, or any other` kind of mineral.

The invention consists in a peculiar arrangement of apparatus for spreadingthe slime upona slowlyrevolving table, whereon the ore will be deposited while the water tlows over it and away, and from which table the said ore is tin-ally scraped oi into a receptacle, all as hereinafterl more fully specitied.

Figure l represents a plan view ot' our improved machine, and

Figure 2 represents a sectional elevation' of the. saine, taken on the line a: a: ofg l.

Similar letters ofl reference indicate corresponding parts. K

A represents a trough, through which the oreis carried by water into a receiver, mounted upon the top oi'a conical table, C, having radiatingr gutters, `D E, calculated to distribute ,the ore as evenly as possible over the principal part ofA a conical rotating table, F, the said receiver B being perforated near the bottom, to allow the slime to pass outequally in all directions frontingr the receiver.

Through these gutters, D and E, theV substance flows, being iinpelled by the water equally upon the table l", where it is deposited in `a thin sheet, allowingr the water and light matters to tlow olf into the circular trough G, having side-issues for the escape of the water and said light matters, 'while the ore which may be carried o ii' the table will be deposited there.

As the table F, whereon the mass of the ore is deposited, moves slowly around, it passes under the brushes or brooms H, suspended by rods, I, from the table C.

These brushes are divided at the centre for breaking the current of the water, giving it a more gentle flow over the table F.

They also serve to stir the ore and permit the water to act with better effect on the light matter.

After the ore passes all-"the brooms, it meets currents of clear water fed 1in through the spout K, and distributing-receiver L, owing downthrough the gutters D and E, f'rontilg the said receiver L.

This ['low is distributed over the table F, in the space between the last broom and a scraper, M, also suspended from the table C, and in front of which a jet of water is discharged from `a pipe, N, leading from the. receiver L, and having a` cock for regulatin(r it.

hThis scraper and jet aredesigned t0 discharge the ore into the trough G, which is provided with suitable dividing-walls, O, for separating the deposite into different grades. Y

From these divisions in the receptacle G, the ore may be taken, or allowedtb ilowout through sidepassages,as required. y g

' For operating the table F, it is provided with a large toothed rack, P, on the under side, which is operated by a pinion, Q, on the end cfa shaft, having a wormwheel, R, operated from a shaft, T, and worm deriving motion ii'oni any competent power.

The said table rests on rollers, U,'and is prevented from lateral movement by guide-rollers, V, working against a tubular projection, W, extending downward around the support X of the table O.

brushes H and scraper M, all arrangedA substantiaIly as specitied. i

3. The combination, with the receiver B, guttelz'ed table '0, table F, and scraper M, of the receiver L, spout K, and pipe N, substantially as specitied.

4. The arrangement of the revolving table F, ylisted table G, support X, projection W, bearing and guiding-rollers, and operating-mechanism, substantially as speciled.

JOSEPH W'. V. BAWLIN S.

, Vitnesses: SAMUEL STEPHENS.

Seru Rens, J. P. EDWARDS. 

